lineaments

这位艺术家仔细观察了模特的脸部轮廓。

The artist carefully studied the ___lineaments of the model's face.

地质学家正在研究这片山区的主要轮廓特征。

The geologist is studying the main ___lineaments of this mountain range.

他的肖像画精确地捕捉了老人脸上的主要特征。

His portrait accurately captured the prominent ___lineaments of the old man's face.